Abstract: A reflection type flow-flashing light, used for issuing a warning signal, which is mounted on the roof of an emergency vehicle, characterized such that rotating lights are installed on the opposite side ends of a unit base, a plurality of reflecting plates against which a flood from the rotating lights reflects in both the forward and backward directions are spaced adequately between the opposite side sections of the rotating lights with the given inclining angles of the reflecting plate, which are different from each other, formed in relation to the rotating lights, respectively and at the same time spaces through which the flood therefrom pass are formed between the above-mentioned reflecting plates.